<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>天气案例</title>
    <!-- 引入vue -->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
       <h2>今天天气很{{info}}</h2>
       <button @click="changeWether">切换天气</button>
       <!-- 绑定事件的时候：@xxx="yyy"  ,yyy可以写一些简单的语句 -->
       <!-- <button @click="isHot=!isHot">切换天气</button> -->
    </div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false //阻止vue在启动生成生产提示。
        new Vue({
            el:'#root',
            data:{
                isHot:true
            },
        computed:{
            info(){
                return this.isHot ? '炎热' : '凉爽' 
            }
        },
        methods: {
            changeWether(){
                this.isHot = !this.isHot
            }
        },
        }) 
    </script>
</html>